Homologous Superfamily

2Fe-2S ferredoxin-like superfamily (IPR036010)

Short name: 2Fe-2S_ferredoxin-like_sf

Overlapping entries


Ferredoxins are small, acidic, electron transfer proteins that are ubiquitous in biological redox systems. They have either 4Fe-4S, 3Fe-4S, or 2Fe-2S cluster. Among them, ferredoxin with one 2Fe-2S cluster per molecule are present in plants, animals, and bacteria, and form a distinct Ferredoxin family [PMID: 2065785]. They are proteins of around one hundred amino acids with four conserved cysteine residues to which the 2Fe-2S cluster is ligated. This conserved region is also found as a domain in various metabolic enzymes.

Several structures of the 2Fe-2S ferredoxin-type domain have been determined [PMID: 8586613]. The domain is classified as a beta-grasp, which is characterised as having a beta-sheet comprised of four beta-strands and one alpha-helix flanking the sheet. The two Fe atoms are coordinated tetrahedrally by the two inorganic S atoms and four cysteinyl S atoms.

GO terms

Biological Process

No terms assigned in this category.

Molecular Function

GO:0009055 electron transfer activity
GO:0051536 iron-sulfur cluster binding

Cellular Component

No terms assigned in this category.

Contributing signatures

Signatures from InterPro member databases are used to construct an entry.